No, not for email. Tech illiterate people use email. They're not going to have the reflex to Ctrl+Z, but a toast with "undo" at least gives them the information

No, not for email. Tech illiterate people use email. They're not going to have the reflex to Ctrl+Z, but a toast with "undo" at least gives them the information that undoing is possible, even if they're not quick enough to click on it